Prelim Examination Flashcards
We define a __________ as the collection of all responses, measurements, or counts that are of interest
Population
__________ is a just a subset of a population. Since we cannot get the whole population to respond, we are using _______ to get a statement about a population
Sample
Any method of selecting a sample that utilizes a random sample.
Probabilistic Sampling
Techniques
The sample size of each stratum in this technique is proportionate to the population size of the stratum when viewed against the entire population.
Proportionate Stratified Random Sampling
Researchers select groups or clusters, and then from each cluster, the researcher selects the individual subjects by either simple random or systematic random sampling.
Cluster Sampling
A sampling technique in which the members of the population are not given an equal chance in the selection of the sample.
Nonprobability Sampling
Techniques
Choosing a sample based on the previous knowledge of the population and the specific purpose of the study or investigation.
Purposive Sampling
It is the process of selecting a sample based on the convenience of the investigator
Convinience Sampling
3 Main measures of Central Tendency
MEAN
MEDIAN
MODE
It can be used for ungrouped
and grouped data
Measure of central tendency
This is the sum of all data values divided by the number of values
Mean
The point at which an equal number of values fall above and fall below
Median
The value with the highest frequency
Mode
Sort data in order
0 2 2 2 3 4 4 6 40
Identify the median and mode?
The middle value is 3, so the median is 3
The mode is 2 since it occurs the most times
Sort Data in order
0 2 2 2 3 4 4 6
Identify the median and mode
The middle values are 2 and 3, so the median is 2.5
The mode is 2 since it occurs the most
In quantitative research and data analysis, __________ refers to the count or number of times a particular value or category appears in a dataset.
Frequency
How to make a frequency distribution?
Identidy the key values (LOWEST VALUE & HIGHEST VALUE)
Determine the number of classes (Given)
Example: 5
Example the Highest value is 125 and the lowest is 67
Calculate the width:
Highest Value - Lowest Value / number of classes
125 - 67 / 5 = 11.6 -> round up to 12
What is Tally Frequency?
It is the (FREQUENCY) number of students that got the score of 67 - 78. Example is there are 3 students that got 67-78 points in the exam, the Tally is 3
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Formula of midpoint
(Lower Limit + Upper Limit) / 2
Formula of relative frequency
Frequency / Total Frequency
Formula of Cumulative Frequency
Number of values in that class or in the lower one
(Get the first frequency then add it to the frequency below and so on)
Formula of Class Boundaries
(Lower Limit - 0.5) - (Upper Limit + 0.5)
